ORTMANN : TERTIARY INVERTEBRATES. 271 



Leonense species: 



Ostrea ingetis. 

 Perna quadrisulcata. 



Cttcull&a a/fa. 

 Turritella ambulacrum. 

 Struthiolaria ornata. 



all of them. 



Suprapatagonian species : 



Ostrea ingens. \ 



Pec ten geminatus. \ 3 out of 6. 



Amathusia angulata. 



This gives about the same result, although the fact is remarkable that 

 of the Leonense species (5) all are found at Santa Cruz, of the others 

 only a part. 



Thus we see, that taking together all the forms mentioned by both, 

 Ameghino and v. Ihering there are, at the type-locality of the Pata- 

 gonian beds, 75* Patagonian species, namely : 



Schizaster ameghinoi. Pecten prcenuncius. Venus patagonica. 



Terebratclla patagonica. Pecten geminatus. Dosinia l&viuscula. 



Cucullcea a/fa. Cardita incequalis. Turritella ambulacrum. 



Perna quadrisulcata. Lucina ortmanni. Struthiolaria ornata. 



Ostrea ingens. Cardium puelchum. Siphonalia domcykoana. 



At the same time, ij Suprapatagonian species are found there, namely 



Cucullcea darwini. Lucina promaucana. Struthiolaria amegltinoi. 



Area patagonica. Amathusia angulata. Marginella gracilis. 



Ostrea ingens. Dosinia mcridionalis. Marginella plicifera. 



Pecten proximus. Scalaria rugulosa. 



Pecten geminatus. Natica darwini. 



These facts would make the locality at Santa Cruz as well Patagonian 

 as Suprapatagonian, and suggests strongly the identity of both. 



On the other hand, we have seen that the so-called "Leonense" species 

 of Ameghino are all (5) found at Santa Cruz, while only a part of the 

 "Juliense" (4 out of 9) have been found there. Of the remaining 5 

 Juliense species, however, 3 have been found at San Julian (Hypechinus 

 Patagonensis, Scutella patagonica, Siphonalia noachina] by Mr. Hatcher. 

 We shall discuss this fact later. 



